diff --git a/Makefile b/Makefile
index 855e8f49..ea9b6665 100644
--- a/Makefile
+++ b/Makefile
@@ -17,6 +17,6 @@ tester: $(objects) random-test.o
 $(objects) : $(headers)
 
 clean :
-	rm ctree *.o
+	rm debug-tree tester *.o
 
 
diff --git a/extent-tree.c b/extent-tree.c
index 2b663ef8..26321524 100644
--- a/extent-tree.c
+++ b/extent-tree.c
@@ -42,7 +42,7 @@ static int del_pending_extents(struct ctree_root *extent_root)
 			ret = search_slot(extent_root, &key, &path, 0);
 			if (ret) {
 				print_tree(extent_root, extent_root->node);
-				printf("unable to find %lu\n", key.objectid);
+				printf("unable to find %Lu\n", key.objectid);
 				BUG();
 				// FIXME undo it and return sane
 				return ret;
@@ -86,7 +86,7 @@ int free_extent(struct ctree_root *root, u64 blocknr, u64 num_blocks)
 	ret = search_slot(extent_root, &key, &path, 0);
 	if (ret) {
 		print_tree(extent_root, extent_root->node);
-		printf("failed to find %lu\n", key.objectid);
+		printf("failed to find %Lu\n", key.objectid);
 		BUG();
 	}
 	ret = del_item(extent_root, &path);
diff --git a/kerncompat.h b/kerncompat.h
index 347ca062..f5efc5f0 100644
--- a/kerncompat.h
+++ b/kerncompat.h
@@ -15,7 +15,7 @@
 #define BUG() abort()
 
 typedef unsigned int u32;
-typedef unsigned long u64;
+typedef unsigned long long u64;
 typedef unsigned char u8;
 typedef unsigned short u16;
 
diff --git a/print-tree.c b/print-tree.c
index 594d23b5..1d591270 100644
--- a/print-tree.c
+++ b/print-tree.c
@@ -11,19 +11,19 @@ void print_leaf(struct leaf *l)
 	int nr = l->header.nritems;
 	struct item *item;
 	struct extent_item *ei;
-	printf("leaf %lu total ptrs %d free space %d\n", l->header.blocknr, nr,
+	printf("leaf %Lu total ptrs %d free space %d\n", l->header.blocknr, nr,
 	       leaf_free_space(l));
 	fflush(stdout);
 	for (i = 0 ; i < nr ; i++) {
 		item = l->items + i;
-		printf("\titem %d key (%lu %u %lu) itemoff %d itemsize %d\n",
+		printf("\titem %d key (%Lu %u %Lu) itemoff %d itemsize %d\n",
 			i,
 			item->key.objectid, item->key.flags, item->key.offset,
 			item->offset, item->size);
 		fflush(stdout);
 		printf("\t\titem data %.*s\n", item->size, l->data+item->offset);
 		ei = (struct extent_item *)(l->data + item->offset);
-		printf("\t\textent data %u %lu\n", ei->refs, ei->owner);
+		printf("\t\textent data %u %Lu\n", ei->refs, ei->owner);
 		fflush(stdout);
 	}
 }
@@ -43,12 +43,12 @@ void print_tree(struct ctree_root *root, struct tree_buffer *t)
 		print_leaf((struct leaf *)c);
 		return;
 	}
-	printf("node %lu level %d total ptrs %d free spc %lu\n", t->blocknr,
+	printf("node %Lu level %d total ptrs %d free spc %lu\n", t->blocknr,
 	        node_level(c->header.flags), c->header.nritems,
 		NODEPTRS_PER_BLOCK - c->header.nritems);
 	fflush(stdout);
 	for (i = 0; i < nr; i++) {
-		printf("\tkey %d (%lu %u %lu) block %lu\n",
+		printf("\tkey %d (%Lu %u %Lu) block %Lu\n",
 		       i,
 		       c->keys[i].objectid, c->keys[i].flags, c->keys[i].offset,
 		       c->blockptrs[i]);
diff --git a/random-test.c b/random-test.c
index 3c8c68d5..111a248b 100644
--- a/random-test.c
+++ b/random-test.c
@@ -42,7 +42,7 @@ static int ins_one(struct ctree_root *root, struct radix_tree_root *radix)
 	char buf[128];
 	init_path(&path);
 	ret = setup_key(radix, &key, 0);
-	sprintf(buf, "str-%lu\n", key.objectid);
+	sprintf(buf, "str-%Lu\n", key.objectid);
 	ret = insert_item(root, &key, buf, strlen(buf));
 	if (ret)
 		goto error;
@@ -54,7 +54,7 @@ static int ins_one(struct ctree_root *root, struct radix_tree_root *radix)
 		goto error;
 	return ret;
 error:
-	printf("failed to insert %lu\n", key.objectid);
+	printf("failed to insert %Lu\n", key.objectid);
 	return -1;
 }
 
@@ -68,10 +68,10 @@ static int insert_dup(struct ctree_root *root, struct radix_tree_root *radix)
 	ret = setup_key(radix, &key, 1);
 	if (ret < 0)
 		return 0;
-	sprintf(buf, "str-%lu\n", key.objectid);
+	sprintf(buf, "str-%Lu\n", key.objectid);
 	ret = insert_item(root, &key, buf, strlen(buf));
 	if (ret != -EEXIST) {
-		printf("insert on %lu gave us %d\n", key.objectid, ret);
+		printf("insert on %Lu gave us %d\n", key.objectid, ret);
 		return 1;
 	}
 	return 0;
@@ -99,7 +99,7 @@ static int del_one(struct ctree_root *root, struct radix_tree_root *radix)
 		goto error;
 	return 0;
 error:
-	printf("failed to delete %lu\n", key.objectid);
+	printf("failed to delete %Lu\n", key.objectid);
 	return -1;
 }
 
@@ -118,7 +118,7 @@ static int lookup_item(struct ctree_root *root, struct radix_tree_root *radix)
 		goto error;
 	return 0;
 error:
-	printf("unable to find key %lu\n", key.objectid);
+	printf("unable to find key %Lu\n", key.objectid);
 	return -1;
 }
 
@@ -137,7 +137,7 @@ static int lookup_enoent(struct ctree_root *root, struct radix_tree_root *radix)
 		goto error;
 	return 0;
 error:
-	printf("able to find key that should not exist %lu\n", key.objectid);
+	printf("able to find key that should not exist %Lu\n", key.objectid);
 	return -1;
 }
 
@@ -148,7 +148,7 @@ static int fill_radix(struct ctree_root *root, struct radix_tree_root *radix)
 {
 	struct ctree_path path;
 	struct key key;
-	u64 found;
+	unsigned long found;
 	int ret;
 	int slot;
 	int i;